Fast Quantification of Whisky Lactone in Oak Wood by Ion Mobility Spectrometer
離子遷移譜儀快速檢測橡木桶中威士忌內酯1,4Bartosz Michalczuk, 3Martin Sabo, 3Katarína Jatzová, 1Ladislav Moravský, 3Martina Gregorová, 1,2Štefan Matej?ík
1Department of Experimental Physics, Comenius University, Mlynská dolina F2,Bratislava, Slovak Republic
2 National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409, Kashirskoe sh. 31, Moscow, Russia
3MaSaTech s.r.o., Sadová 3018/10Stará Turá, Slovak Republic
4Siedlce University of Natural Sciences and Humanities, Faculty of Exact and Natural Sciences, Siedlce, Poland.
Abstract
An Ion Mobility Spectrometry (IMS) apparatus has been used to detect the β-methyl-γ- octalactone (Whisky Lactone – WL) standard in the air and as well WL vapours originating from the oak wood samples. The IMS was equipped with Atmospheric Pressure Chemical Ionisation (APCI) ion source based on a Corona Discharge (CD) and was operated in the positive polarity. The IMS spectrum of WL exhibits two peaks, a monomer with reduced ion mobility value K0=1.39 cm2V-1s-1 and dimer K0=1.09 cm2V-1s-1. Using Ion Mobility orthogonal acceleration Time of Flight mass spectrometer (IMS-oaTOF MS) these peaks were identified as protonated monomer M.H+.(H2O)0,1 and dimer M2 .H+ ions respectively. The limit of detection study resulted in LOD for WL of 50 ppbv. Detection of WL from oak wood samples of different “Quality Level” (QL) categories (categories 1 to 10), indicated strong correlation between the QL category number and the response of the IMS.
離子遷移光譜法(IMS)已用于檢測空氣中β-甲基-γ-辛烷(威士忌內酯-WL)標準物質以及橡木樣品中產生的WL蒸氣。IMS配備了基于電暈放電(CD)的大氣壓化學電離(APCI)離子源，并在正極性下工作。WL的IMS譜有兩個峰，一個是離子遷移率降低值K0=1.39cm2v-1s-1的單體，另一個是二聚體K0=1.09cm2v-1s-1。利用離子遷移率正交加速飛行時間質譜儀(IMS-oaTOF-MS)分別鑒定出質子化單體M.H+(H2O)0,1和二聚體M2.H+離子。由于檢測研究的局限性，WL的LOD為50ppbv。從不同“質量水平”(QL)類別(類別1至10)的橡木木材樣本中檢測到WL，表明QL類別數與IMS的響應之間存在很強的相關性
